<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <!-- 准备一个容器 -->
    <div id="test"></div>

    <!-- 引入react核心库 -->
    <script type="text/javascript" src="../js/react.development.js"></script>
    <!-- 引入react-dom，用于支持react操作DOM -->
    <script
      type="text/javascript"
      src="../js/react-dom.development.js"
    ></script>
    <!-- 引入babel，用于将jsx转为js -->
    <script type="text/javascript" src="../js/babel.min.js"></script>

    <script type="text/babel">
      //定义类式组件
      class Weather extends React.Component {
        constructor(props) {
          //调用父类
          super(props);
          //初始化状态
          this.state = { isHot: false, wind: "微风" };
          //解决changeWeather中this指向问题
          //   this.changeWeather = this.changeWeather.bind(this);
          console.log(props);
        }
        render() {
          console.log(this);
          console.log("render");
          const { isHot } = this.state;
          return (
            <h1 onClick={this.changeWeather}>
              今天天气真{isHot ? "炎热" : "凉爽"}
            </h1>
          );
        }
        //修改日期
        changeWeather() {
          console.log("changeWeather");
          const isHot = this.state.isHot;
          this.setState({ isHot: !isHot });
          console.log(this);
        }
      }
      ReactDOM.render(<Weather />, document.getElementById("test"));
    </script>
  </body>
</html>
